Car won't start; radio & door chime work fine. tried to boost, but still won't start. is it starter or alternator? when you turn ignition, lights come on, but nothing happens at all. when trying to boost, same sound, engine didn't even turn.

check fuses and relays --try boosting the car battery may be able to turn on lights but not able to start vehicle their is a tsb technician ser vice bulletin on the 07 for power drain from the onstar module if starts have battery and alternator tested most auto stores offer this service for free -no start check key and ignition switch for wear worn key or switch will turn but not start vehicle and also check starter but the occasional click points toward a dead battery COMMUNICATION PROVIDES INFORMATION TO HELP THE DEALERSHIP TECHNICIANS PERFORM A PARASITIC DRAIN TEST FOR THE ONSTAR MODULE. WHEN PERFORMING BATTERY PARASITIC DRAIN TEST,
Want to learn how to fix NHTSA #10078735?f
http://www.pontiacproblems.com/tsbs/G6/2007

Most cars do this including the head lights , so the starter and ignition have less drain while starting. not sure if your model does this, If every thing is ok after starting nothing to worry about. If it wont start clean the battery terminals and check charging rate and battery.

When you turn the ignition switch to the start position
on any vehicle, there is no dash lights or anything,that is
how it works

Test the ignition switch & the starter & starter relay

After trying to read this a couple times to get the gist, I would definitely have the battery tested for it's cold-cranking amps. Regular voltage and power can register normal, but the cold-cranking amps are what matter when starting the car. Also, if there is any problem with your alternator, it can be draining your battery of the juice it needs. After testing the alternator, check for any belts that may be too tight, causing the starter to have to work harder than it should when cranking over to start the car.

Try jumping/boosting the vehicle, all of the above will still work with a weak/low battery but the starting system takes a lot of amperage to turn over the engine. If you only left the keys in the car and no lights on or anything running why would it not start if it was starting correctly before??? Whats happened since the car was last started?

the battery is totally to the point that not enough amps are being received from it,, so a jump won't even help, charge it completely ,, the lights and other items on the car require small amperage and 12 volts,, the starter requires a bunch of amps to turn it over, after you do that ,, check the alternator you can use a meter on the battery posts with the car running, and should have a reading of 13.5 to 14.5 volts

Get a new radio. Or an aftermarket radio with $180 adaptor. Sucks, but the radio ties into the security of the car, which may be effecting your starter. Sorry, these are probably the only options.

Heres a link about security systems shutting down starters on GM cars http://vatspasslockpasskeysecurityhelp.yolasite.com/

Had the same problem! I had to replace the Ignition switch, which took care of the problem! You can try that! Thirty-five dollar part!

Low voltage will cause the problem you are having,get the battery charged,and then have the alternator checked for the correct out put,13.65 to 14.25 if it is not in this range give or take a couple of volts,replace it,I would have the battery replaced also,so you won`t have the problem again.Have a shop replace the battery,if you do it yourself,the memory could be erased if certain measures are not performed.

Saturns are a little touchy. First thing to do is try jump starting it because these cars will only work partially if the battery is not at full capacity. Also check both fuse boxes, the one by the passenger left foot panel and the one under the hood. If all these are good then jack the car up, use a hammer to tap on the starter(located at the back of the engine by the firewall) while someone turns the key. GOOD LUCK